Matrix properties
number of rows	10,001
number of columns	10,001
nonzeros	49,999
structural full rank?	yes
structural rank	10,001
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	19,992
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	J. Blowey
editor	N. Gould
date	1992
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	39,996	53,226
Cholesky flop count	1.6e+05	2.9e+05
nnz(L+U), no partial pivoting	69,991	96,451
nnz(V) for QR, upper bound nnz(L) for LU	40,003	50,856
nnz(R) for QR, upper bound nnz(U) for LU	79,974	90,820

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 19992 explicit zero entries.

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.